Relation between the Light Transmission of the Glazing System and Daylight Factor

Windows are one of the most important parts of the building façade. Their main function is to ensure sufficient illumination of interiors and contact with outdoor environment, either directly or indirectly. The optical properties of the glazed part of these envelop apertures have significant influence on a lot of requirements, which have to be satisfied at the same time. The daylight distribution on the working plane is most affected by the glazing system’s light transmission. This study offers a simple method, how to find the appropriate value of the glazing system’s light transmission in relation to the Daylight Factor, in order to ensure the required daylight distribution in interior.